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    <meta charset="UTF-8" />
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    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
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  <body>
    <!-- 二维数组去重 -->
    <script>
      function Deduplicate() {
        let arr = [
          [1, 4, 5],
          [1, 4, 5],
          [1, 1, 1]
        ]
        let hash = {}
        let res = []
        for (let i = 0; i < arr.length; i++) {
          if (!hash[arr[i]]) {
            res.push(arr[i])
            hash[arr[i]] = true
          }
        }
        return res
      }
      console.log(Deduplicate())
    </script>
  </body>
</html>
